Control cabinets for power transformers Experienced partner.
Quality guaranteed.

Technology now offers advanced and diversified monitoring, automation and control features that can provide an accurate picture of the functioning and status of power transformers. With thousands of achievements for the world's most important manufacturers, we are your North-American specialists in the design, electrical engineering and customized manufacturing of control cabinets for power transformers.

Depending of the desired involvement level, we take care of the manufacturing of your control cabinets in full compliance with your specifications and deadline. Our robust solutions include circuits for all standard accessories, as well as electrical wiring, and any other electrical apparatus or component provided with the transformer. We speak your language, the language of quality, trust and commitment, and we adapt to your reality.

Brochure - New Installation

In full compliance with requirements and industry standards

Standardized design

  • CSA and UL certified design, and compliant with IEEE C57.148 standard if required.
  • ONAF, OFAF and ODAF standard control circuit, including Auto/Off/manual, and lead stage selector switch
  • Interface for level gage alarm, control and protection signals, pressure relay and other transformer components
  • Temperature monitoring for critical applications
  • Component integration: annunciator, on-load tap-changers, transfer switch, temperature controller, fiber optic sensors and more
  • Programming and configuration of controllers, protection relays and communication networks
  • Terminal standard layout to control cooling, alarms, trigger circuits and test switches
  • Comprehensive set of drawings, wiring plans, wiring diagrams, layout plan and hardware list

Robust component selection

  • Robust manufacturing terminals for alarms, control, power and measuring
  • Terminals for current transformer and test switch
  • Protection relays,temperature controller, remote terminal, annunciator, tap changer controller, power transformer monitoring system.
  • Choice of communication medium such as copper, optical fiber, radio or satellite, according to the required protocol and available infrastructure (DNP3, IEC 61850 and more)
  • Robust accessories: GFCI receptacles, heating, ventilation and drain.

Specialized manufacturing

  • Robust NEMA/IEC cabinet for outdoor use made of painted steel or stainless steel
  • Inside doors, 3-point handles, rain protector and industrial-grade hardware
  • Support for gages or other components
  • Gland plate, external and internal NEMA ground pad
  • SIS, ETFE, MTW/TEW wiring
  • Numbering and labeling system compliant with client requirements and IEEE Std C37.2
  • Provision for cabinet assembly on equipment

A customized collaboration for your customized projects

Our reliable and proven approach is based on adaptability as the main success factor. You determine the scope and limits of our contribution. Does your project require a more elaborate contribution? Our experience covers all fields of expertise and services for a turnkey solution. Whether as a provider according to your technical specifications or as an experienced partner that supports your teams, our experience is complete, wide and recognized. Our updated knowledge of North-American standards and access to the best components on the market ensures you full compliance with your requirements and deadlines.

Highly specialized design and electrical engineering

We have made control cabinets for power transformers our specialty. An established reputation recognized by the industry's key players. Our know-how and processes are focused on offering an optimal, reliable and compliant solution through a flexible, professional business relationship. Our team of experienced engineers combines technical aspects, customer relationship, project management, analysis, design and production engineering into a robust and proactive logic. Your technical requirements are soundly translated into a diagnosis and optimized plans compliant with industry standards.

Robust and reassuring project management

Nomos assumes complete responsibility for your project. Our engineering team knows your concerns and requirements. This wide experience gained through thousands of projects drives our relationship with you and your teams. We consider every dimension of your project through a process that became our trademark. We combine compliance, cost control, and meeting specifications and deadline to ensure your total satisfaction.

Reliable and sustainable manufacturing

Production engineering integrated to manufacturing ensures control cabinets perfectly assembled and tested in compliance with your specifications, your client's requirements and main standards such as IEEE Std C57.148, CSA 22.2 or UL508.

Proactive and accessible service

To complement our products' reliability, we provide you with technical support and customer service that offer you peace of mind. Whether it be for a technical problem, replacement parts or alternatives, our team is always available. Does your situation require on-site servicing? A qualified expert will oversee the start-up of your control cabinets.